title: A hybridization model for Rhipicephalus appendiculatus and R. zambeziensis (Acarina: Ixodidae) using glucose-6-phosphate-isomerase isoenzymes.
abstract: In the Eastern Province of Zambia, Rhipicephalus appendiculatus (Neumann) and R. zambeziensis (Walker) are sympatric. Intermediate forms as well as typical specimens are found. No morphological criteria could detect cross-breeding between these species in the field. Hybrids between R. appendiculatus and R. zambeziensis were produced and glucose-phosphate-isomerase (EC 5.3.1.9.; GPI) isoenzymes resolved by agarose electrophoresis. Phenotyping hybrids in the F1 and F2 generations was explained by the autosomal transmission of two loci of GPI-genes. Identification of some hybrid phenotypes offers the possibility of showing presently undetected hybridization in the field. A genetic model is proposed to explain the patterns.
authors.affiliation: Institute of Tropical Medicine, Antwerp, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Wouters
mesh_terms: D000483:Alleles; D000818:Animals; D003433:Crosses, Genetic; D004587:Electrophoresis, Agar Gel; D005260:Female; D005956:Glucose-6-Phosphate Isomerase / Q000032:analysis*; D006824:Hybridization, Genetic; D007527:Isoenzymes / Q000032:analysis; D008297:Male; D008957:Models, Genetic; D010641:Phenotype; D013987:Ticks / Q000145:classification / Q000201:enzymology / Q000235:genetics*
chemical_list: D007527:Isoenzymes; D005956:Glucose-6-Phosphate Isomerase